Fan Motors Removal; Antenna Motors (Upper And Lower) Removal; Power Unit Removal; Control Panel Assembly And Control Unit Removal - Sharp R-1900J Service Manual

R1900J

[10] FAN MOTORS REMOVAL

1. CARRY OUT 3D CHECKS.
2. Remove the rear cover.
3. Disconnect the connector of the fan motor from the connector of
the wire harness.
4. Remove the three (3) screws holding the fan motor to the motor fix-
ing angle and magnetron cool duct A.

[11] ANTENNA MOTORS (UPPER AND LOWER) REMOVAL

1. UPPER
1. CARRY OUT 3D CHECKS.
2. Remove the rear cover.
3. Disconnect the wire leads from the antenna motor (upper).
4. Remove the one (1) screw holding the antenna motor (upper) to the
oven cavity.
5. Turn and lift up the antenna motor (upper).
6. Now, the antenna motor (upper) is free.

[12] POWER UNIT REMOVAL

1. CARRY OUT 3D CHECKS.
2. Disconnect all wire leads and connectors from the power unit.
3. Remove the four (4) screws holding the power unit to the PWB
holder.

[13] CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL

1. CARRY OUT 3D CHECKS.
2. Disconnect all connectors from the control unit.
3. Remove the vinyl tape with a cushion attached to the oven cavity
face plate and the control panel case.
4. Remove three (3) screws holding the control panel to the oven cav-
ity face plate.
5. Now the control panel assembly is free.
6. Remove five (5) screws holding the control unit to the panel fixing
plate.
7. Remove the CPU protect sheet from the control unit.
8. Now, the control unit is free.
CAUTION: When installing the control unit into the control panel frame:
1) Be careful not to damage any of the components on the
control unit.
2) When inserting key units ribbon cable through the
frame, ensure it is not pinched or bent.
NOTE: 1) Before attaching a new key unit, remove remaining adhe-
sive on the panel fixing plate surfaces completely with a
soft cloth soaked in alcohol.

[14] RELAY UNIT REMOVAL

1. CARRY OUT 3D CHECKS.
2. Disconnect all wire leads and connectors from the power unit and
the relay unit.
3. Remove the four (4) screws holding the PWB holder to the oven
cavity top plate and the noise filter angle.
5. Release the wire leads of the fan motor from the wire holder.
6. Remove the fan motor from the oven cavity.
7. Now, the fan motor is free.
2. LOWER
1. Disconnect the oven from the power supply.
2. Remove the two (2) screws holding the motor protect cover to the
bottom plate assembly.
3. Remove the motor protect cover from the bottom plate assembly.
4. Disconnect the wire leads from the antenna motor (lower).
5. Remove the one (1) screw holding the antenna motor (Lower) to
the oven cavity.
6. Now, the antenna motor (lower) is free.
4. Now, the power unit is free.
2) When attaching the key unit to the panel fixing plate, adjust
the lower edge and left edge of the key unit to the correct
position of panel fixing plate.
3) Stick the key unit firmly to the panel fixing plate by rubbing
with soft cloth to prevent scratching.
4) When the control unit is replaced, set the standard voltage
referring to Special function pages.
5) Attach the vinyl tape and the cushion to the oven cavity
face plate and the control panel case after the control panel
assembly is installed.
Control panel case
4. Remove the PWB holder with the power unit and the relay unit from
the oven cavity.
5. Remove the six (6) screws holding the relay unit to the PWB holder.
6. Remove the relay unit from the PWB holder.
7. Now, the relay unit is free.
9 – 4
Cushion
Vinyl tape
(W 20mm x L 520mm)
Cavity front
plate